The two rays in the east-west direction and the north-south direction cross each other, and the x value and y value at the intersection point are both 0 (the geographical position of this point is fixed). The deviation value between the east-west direction and the intersection is y, and the deviation value between the north-south direction and the intersection is x.
Coordinates are widely used by building surveyors. When setting out, select a coordinate point on the map, and input the coordinates of X axis and Y axis into total station or GPS to find the position of the point. The building coordinate map is more accurate in the drawing.
Extended data:
Building coordinates are on the general plan of building engineering design. Usually, the coordinates of the building grid are calculated with the building coordinate system (that is, the assumed coordinate system), so that the design coordinates of all buildings are positive, and the longitudinal axis and transverse axis of the coordinates are parallel or perpendicular to the axis of the main building or pipeline. The building coordinate system is the building coordinate system.
In order to facilitate the work, the building coordinate system (that is, the assumed coordinate system) is usually used to calculate the coordinates of the building grid in the general plan of building engineering design, so that the design coordinates of all buildings (structures) are positive, and the longitudinal axis and transverse axis of the coordinates are parallel or perpendicular to the axis of the main building or pipeline. The building coordinate system is the building coordinate system.
Baidu encyclopedia-building coordinates